Remove system environment variable using command line ?

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Hello,

How do I remove system environment variable using command line ?
For example I can add it using:
setx y 10 -m
But from setx documentation:
"You cannot use setx to remove values added to the local or system
environments."

(I know how to remove using GUI but this is not the case)

thanks
Vilius

"Vilius Mockûnas" <v_mockunas@yahoo.com> wrote in message
news:uOmTtc06JHA.5828@TK2MSFTNGP04.phx.gbl...
> Hello,
>
> How do I remove system environment variable using command line ?
> For example I can add it using:
> setx y 10 -m
> But from setx documentation:
> "You cannot use setx to remove values added to the local or system
> environments."
>
> (I know how to remove using GUI but this is not the case)
>
> thanks
> Vilius

The following script will first set, then remove the system variable %XVar%:
Set wshShell = CreateObject("WScript.Shell")
Set wshSEnv = wshShell.Environment("System")
sMyVar = "XVar"
wshSEnv(sMyVar) = "Vilius"
WScript.Echo "Variable " & sMyVar & " is now set to Vilius"
wshSEnv.Remove sMyVar